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|
Attributes | |
ACN | 410276 |
Time | |
Date | 199808 |
Day | Tue |
Local Time Of Day | 0601 To 1200 |
Place | |
Locale Reference | atc facility : byp airport : dfw |
State Reference | TX |
Altitude | msl bound lower : 6000 msl bound upper : 7000 |
Environment | |
Flight Conditions | Marginal |
Light | Daylight |
Aircraft 1 | |
Controlling Facilities | tracon : dfw |
Operator | common carrier : air carrier |
Make Model Name | MD-88 |
Operating Under FAR Part | Part 121 |
Navigation In Use | Other Other |
Flight Phase | descent other |
Route In Use | arrival other arrival star : star enroute : on vectors |
Flight Plan | IFR |
Aircraft 2 | |
Operator | common carrier : air carrier |
Make Model Name | Saab-Scania Undifferentiated or Other Model |
Operating Under FAR Part | Part 121 |
Navigation In Use | Other Other |
Flight Phase | cruise other |
Route In Use | arrival other arrival star : star |
Flight Plan | IFR |
Person 1 | |
Affiliation | company : air carrier |
Function | flight crew : first officer |
Qualification | pilot : atp |
Experience | flight time last 90 days : 150 flight time total : 2500 flight time type : 225 |
ASRS Report | 410276 |
Person 2 | |
Affiliation | company : air carrier |
Function | flight crew : captain oversight : pic |
Qualification | pilot : atp |
Experience | flight time last 90 days : 200 flight time total : 8000 flight time type : 3000 |
ASRS Report | 411138 |
Events | |
Anomaly | conflict : nmac non adherence : required legal separation non adherence : published procedure other anomaly other |
Independent Detector | aircraft equipment other aircraft equipment : unspecified other flight crewa |
Resolutory Action | flight crew : took evasive action |
Consequence | Other |
Miss Distance | horizontal : 200 vertical : 250 |
Supplementary | |
Primary Problem | ATC Human Performance |
Air Traffic Incident | Operational Error |
Narrative:
On the bonham arrival near the lemyn intersection, we were instructed to descend from 7000 ft to 6000 ft. We were at 230 KIAS as assigned. Approximately 1-2 mi prior to lemyn we got a TCASII TA. The captain and myself looked outside for the target. We did not get a visual prior to the RA which quickly followed. The captain disconnected the autoplt, started a climb and a right turn to 260 degrees. Our instructions were to turn to 260 degrees at lemyn intersection. As we started the climb and turn, I saw the target (a saab 340) below us, going in the same direction. I estimated the near miss at 300 ft vertically and 300 ft horizontally. The TCASII audio climb warning occurred during this time. The captain picked up the saab out of the left window. His estimate on the closest point of approach is 200 ft laterally and between 200-300 ft vertically. The vertical estimate is based on the TCASII RA data tag. We believe the saab either did not leave his assigned altitude or did so with an inappropriate rate of descent. We were not on the same approach control frequency which might have caused some lack of mutual awareness. Controller distraction or inattn may have contributed to the situation.
Original NASA ASRS Text
Title: ACR MD88 FLC EXECUTE EVASIVE MANEUVER TO AVOID TFC ON THE SAME ROUTING INTO DFW.
Narrative: ON THE BONHAM ARR NEAR THE LEMYN INTXN, WE WERE INSTRUCTED TO DSND FROM 7000 FT TO 6000 FT. WE WERE AT 230 KIAS AS ASSIGNED. APPROX 1-2 MI PRIOR TO LEMYN WE GOT A TCASII TA. THE CAPT AND MYSELF LOOKED OUTSIDE FOR THE TARGET. WE DID NOT GET A VISUAL PRIOR TO THE RA WHICH QUICKLY FOLLOWED. THE CAPT DISCONNECTED THE AUTOPLT, STARTED A CLB AND A R TURN TO 260 DEGS. OUR INSTRUCTIONS WERE TO TURN TO 260 DEGS AT LEMYN INTXN. AS WE STARTED THE CLB AND TURN, I SAW THE TARGET (A SAAB 340) BELOW US, GOING IN THE SAME DIRECTION. I ESTIMATED THE NEAR MISS AT 300 FT VERTLY AND 300 FT HORIZLY. THE TCASII AUDIO CLB WARNING OCCURRED DURING THIS TIME. THE CAPT PICKED UP THE SAAB OUT OF THE L WINDOW. HIS ESTIMATE ON THE CLOSEST POINT OF APCH IS 200 FT LATERALLY AND BTWN 200-300 FT VERTLY. THE VERT ESTIMATE IS BASED ON THE TCASII RA DATA TAG. WE BELIEVE THE SAAB EITHER DID NOT LEAVE HIS ASSIGNED ALT OR DID SO WITH AN INAPPROPRIATE RATE OF DSCNT. WE WERE NOT ON THE SAME APCH CTL FREQ WHICH MIGHT HAVE CAUSED SOME LACK OF MUTUAL AWARENESS. CTLR DISTR OR INATTN MAY HAVE CONTRIBUTED TO THE SIT.
Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.